////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2018-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

// This file implements a tab bar derived from QTabBar with a contextmenu
// and possibility to close a tab via double-left or middle mouse click.

#if ! defined (octave_tab_bar_h)
#define octave_tab_bar_h 1

#include <QMenu>
#include <QMouseEvent>
#include <QSize>
#include <QStyleOptionTab>
#include <QStylePainter>
#include <QTabBar>

namespace octave
{
  // Subclassed QTabBar for usable tab-bar, rotated tabs and
  // reimplemented mouse event

  class tab_bar : public QTabBar
  {
    Q_OBJECT

  public:

    tab_bar (QWidget *p);

    ~tab_bar (void) = default;

    void set_rotated (int rotated);
    QMenu *get_context_menu (void) { return m_context_menu; };
    QSize tabSizeHint (int idx) const;

  signals:

    void close_current_tab_signal (bool);

  public slots:

    void switch_left_tab (void);
    void switch_right_tab (void);
    void move_tab_left (void);
    void move_tab_right (void);
    void sort_tabs_alph (void);

  private slots:

    void ctx_menu_activated (QAction *a);

  protected:

    void paintEvent(QPaintEvent *e);
    void mousePressEvent(QMouseEvent *event);

  private:

    void switch_tab (int direction, bool movetab = false);

    QMenu *m_context_menu;
    QList <QAction *> m_ctx_actions;
    int m_rotated;
  };
}

#endif
